English Carbon dioxide in Earth's atmosphere Cited by user Neils51 on 08 Jul 2022 Carbon dioxide is an important trace gas in Earth's atmosphere. It is an integral part of the carbon cycle, a biogeochemical cycle in which carbon is exchanged between…
English Carbon dioxide in Earth's atmosphere Cited by user CometEncke on 13 Jan 2016 Concentrations of in the atmosphere were as high as 4,000 parts per million (ppm) during the Cambrian period about 500 million years ago to as low as 180 ppm during the…